Air-cooling apparatus for explosive-engines.



PATENTED JAN. 7, 1908.

J. B. GILSON. AIR COOLING APPARATUS FOR EXPLOSIVE ENGINES.

APPLIOATION FILED MAYIG, 1907.

JOHN E. GILSON, OF PORT \VASHINGION. \YTSCONS COMPANY, OF PORT WA TN, ASSIGNOR 'lO GILSON MANUFACTURING SHINGTON, WISCONSIN.

AIR-COOLING APPARATUS FOR EXPLOSIVE-ENGINES.

Specification of Letters Patent.

Patented Jan. '7, 1908.

Application filed May 16, 1907. Serial No. 374.056.

To all whom it may concern:

Be it known that I, JOHN E. GILSON, a citizen of the United States, and resident of Port lVashington, in the county of Ozankee and State of Wisconsin, have invented. certain new and useful Improvements in Air- Cooling Apparatus for Explosive-Engines; and I do hereby declare that the followingis a full, clear, and exact description thereof.

The object of my invention is to provide a durable, economical and. efl'ective air-cooling apparatus for explosive-engine cylinders, said invention consisting in certain peculiarities of construction and combination of parts as l'iereinafter described with reference to the accompanying drawings and subsequently claimed.

In the drawings: Figure 1 represents a plan view of the head and portion of an engine-cylinder having attached thereto a cooling-fan ei'n-bodying the features of my invention, the view being partly broken away and in section, as indicated by line 1-1 of Fig. 2, and Fig. 2, a sectional end-view of same, as indicated by line 22 of Fig. 1, illustrating the manner. of attaching the fan to the cylinder-head, which head is shown detached from said cylinder.

Referring by letter to the drawings, A indicates a portion of a circumferentially flanged cylinder of an explosive-engine, having secured thereto a head B that is provided with the usual gas-inlet and discharge-openings, spark-plug connections and bosses (I, through which bosses retaining-bolts for said head and cylinder are fitted. Said bosses O are connected by vertical strengtheningwebs a, to one of which is bolted a fan-supporting bracket D, as shown. Projecting from the bracket is a shouldered stud c having loosely mounted thereon a hub d of a (.lriving-pulley e, the said hub being also formed with radial wings f, to which are secured the vanes g of a rotary fan, there being a suitable dope-cup for lubricating the hub fast on the end of its bearing-stud.

. In'order to obtain an economical drivinggear together with efficiency in cooling, fans of the ty e to which my invention pertains are usual y located in the position as shown. In this position the axis of the fan with relation to the cylinder is such that approximately half the air-current generated by said fan is thrown directly against the rear end portion of the cylinder at a right-angle l x l l 1 l l l l l which the invention pertains.

to its bore, while a portion of the remaining half of the air passes odgewise over the cylinder-head. The described arrangement results in considerable loss of cooling elliciency owing to the fact that the,head of the cylinder where the explosion takes place receives no direct air current, but only a slight portion which is deflected edgewisc thereof, while the greater portion of one-half of the fan ca acity to the rear of said head is en-..65 tirely ost.

To overcome the above objectionable feature and utilize the entire fan-capacity, the said fan in this instance is provided with an annular casing or band E concentric to the fan, which serves the double purpose of confining the air from shedding radially of the vanes and also acts as' a guard. therefor. Thiscasing or band is supported from the bracket D, by means of spokes h, confined in apertures in said bracket and secured thereto by suitable set-screws i, the outer end of the spokes terminating in feet, which feet are riveted to said band, as shown in Fig. 2, of the drawings.

That portion of the band which projects beyond the rear of the head B, for approxi mately half its diameter, is provided with a segmental hood-extension F, which extension forms an inwardly inclined deflector, its angle being su flicicnt to throw the: air directly against the rear face of the head or towards the axis of the fan, as indicated by full line arrows, while the opposite half of said fanarea directs the air in a line parallel with said fan-axis, as indicated by the arrows in dotted lines.

From the foregoing description it will be thus seen'that the peculiarities of the formation of the combined guard and casing results in an economical and efficient increase in the capacity of the cooling-fan, with no material increase in cost of manufacture over the present cooling-fans of the type to I claim:

1. An explosive-engine cylinder a rotary fan supported in connection with the cylinder parallel to same, and a circular casing for the fan having a hood-extension inclined inward toward the axis of said fan beyond the cylinder-head.

2. An explosive-engine cylinder, a bracket secured to the head of the cylinder, at rota fan supported in connection with the bracket I nection Wth the bracket parallelto said cylina bracket attached to the web, a 'rotary fan head-bosses, a web connecting the bosses, a

- the stud, and a circular casing for. the fan axis of said fan beyond the cylinder-head.

. in connection with the head of the cylinder, a

der, and a circular casing for the fan having a hoodextension inclined inward toward the I 4. An explosive-engine cylinder having 5 head-bosses, a web connecting the bosses,

supported inconnection with the bracket arallel to said cylinder, and a circular casing or thefan having a hood-extension inclined inward toward the axis of said fan beyond the cylinder-head.

5. An explosive-engine cylinder having bracket bolted to the web, a rotary fan supported in connection with the bracketparallel to said cylinder, and a circular casing for the fan having a hood-extension inclined inward toward the axis of said fan beyond the cylin+ der-head. i

6. An explosive-engine cylinder, a bracket shouldered stud projecting from the bracket at a right-angle to said cylinder, a rotary fan having the hub thereof loosely mounted on having a hood-extension inclined inward toward the axis of said fan beyond the cylinder-head.

7. An explosive-engine cylinder, a bracket iii-connection with the head of the cylinder,

. a shouldered stud projecting from the bracket 5 at a right-angle to said. cylinder, a rotary fan having its hub loosely mounted on the stud, a belt-pulley rigid with said. hub, and a circular casing for the fan, having a hood-extension inclined inward toward the axis of said fan beyond the cylinder-head.

8. An explosive-engine cylinder, a bracket in connection with the head of the cylinder, a shouldered stud projecting from the bracket at a right-angle to said cylinder, a lubricator attached to the stud, a rotary fan-and-pulley 'hub loose on said stud between the shoulder of same and the lubricator, and a circular casing forthe fan havin a hood-extension inclined inward toward tie axis of saidfan beyond the cylinder-head." c

9. An explosive-engine cylinder, a bracket in connection with the head of the cylinder, a

rotary fan supported in connection with the bracket parallel tosaid cylinder,.spokesalso in connection with said bracket, and a circu lar casing for the fan in connection-With the spokes and having a hood-extension inclined inward toward the axis of the fan beyond the cylinder-head.

10. An explosive-engine cylinder, a bracket in connection with the head of the cylinder, a rotary fansupported in connection with the bracket, parallel to said 0 linder, spokes set in apertures of said brac et, set-screws arranged to secure the spokes, and a circular casing for the fan attached to said spokes and having a hood-extension inclined inward toward the axis of the fan beyond the cylinder-head.

l 1 An explosive-engine cylinder, a bracket inconnection with the head of the cylinder, a stud projecting from the bracket at a rightangle to said cylinder, a driving pulley having a hub loosely mounted on the stud and provided \idth radial Wings, fan-vanes secured to the hub-wings, and a circular casing for the fan having a hood-eXtension inclined inward toward the axis ,of saidfan beyond the cylinder-head. i

In testimony that I claiin the foregoing l have hereunto set my hand at Port Washington in the county of Ozankee and Stateof Wisconsin in the presence of two witnesses. v

JOHN E. GILSON. Witnesses;

ITIARRY l/V. BOLENS, '1. A. BOERNER. 

